Technical Specifications:

• Part Number: CPU61203/110
• Input Voltage: 110V AC (as designated by “/110” suffix)
• Control Output: Multi-channel relay/triac drive outputs
• Communication Protocol: I²C / Serial bus interface
• Operating Temperature Range: -10°C to +85°C
• PCB Material: FR-4 Glass Epoxy (flame retardant, UL94 V-0 rated)
• Mounting Type: PCB through-hole / connector plug-in
• Firmware: Pre-programmed for specific appliance cycle library

Functional Features:

• Full Cycle Management: Controls wash, rinse, spin, and drain sequences.
• Motor Speed Regulation: Drives BLDC or Universal motor via variable frequency.
• Water Level Sensing: Interfaces with pressure switch / water level sensor.
• Temperature Monitoring: Reads NTC thermistor inputs for heated wash cycles.
• Door Lock Control: Manages door interlock solenoid for safety.
• Error Code Diagnostics: Stores and displays fault codes on LED/LCD panel.
• Eco-Mode Logic: Optimizes water and energy usage per load weight.

Material Composition:

• PCB Substrate: FR-4 epoxy glass fiber
• Solder: Lead-free SAC305 (Sn96.5/Ag3.0/Cu0.5)
• Connectors: Molex / JST standard appliance connectors
• Encapsulation: Conformal coating (silicone-based) for moisture protection
• IC Components: Surface-mount microcontroller (MCU), MOSFETs, relays, optocouplers

Structural Features:

• Rectangular PCB form factor.
• Multiple connection harness ports (typically 8-16 pin connectors).
• Heat sink mounting points for power components (triacs/relays).
• EMI shielding zone on control logic section.

Working Principle:
The MCU on the CPU board executes a pre-loaded firmware program. It reads inputs from water level sensors, temperature NTCs, door switch, tachometer (motor speed), and pressure switch. Based on the selected program, it drives output relays/triacs to control water inlet valves, drain pump, heater element, and motor inverter. Feedback loops ensure each phase completes before advancing to the next.

Key Advantages:

• Centralized control — single board manages entire wash cycle.
• Diagnostic capability — fault codes enable rapid servicing.
• Wide voltage compatibility within Electrolux Group platform.
• Robust conformal coating ensures long-term reliability in humid environments.

Applicable Industries/Use Cases:
Home appliance manufacturing (washing machines), appliance repair and servicing, OEM spare parts supply, industrial automation (adapted platforms).

Installation Requirements:

• Install in dry location inside appliance control cavity.
• Connect all harness plugs fully — partial connection causes error codes.
• Ensure grounding of PCB mounting bracket.
• Replace with exact part number; do not substitute with non-equivalent units.

Usage Precautions:

• Handle by edges only — ESD-sensitive components on board.
• Do not expose to direct water spray.
• Verify input voltage matches 110V specification before powering.
• Update firmware only via authorized service tools.